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Fredericksburg.

Description: Map shows Union and Confederate fortifications in the vicinity of Fredericksburg, Virginia; landowners, canals, roads, and railroads; layout of Fredericksburg and Falmouth; course of the Rappahannock River. Scale [ca. 1:38,990].
Date: [1891..1895]
Creator: United States. Army. Corps of Engineers.
Partner: University of Texas at Arlington Library

Rotary Reciprocating Engine

Description: Patent for this invention has relation to the type of engines combining rotary and reciprocating movements in one structure, the purpose being to combine the working elements in such relation as to convert maximum percentage of force into available form for the performance of work.
Date: January 22, 1901
Creator: Williams, Win D.
Partner: UNT Libraries Government Documents Department